Scientists at Oregon State University devised an experiment in which 23 couples, whose genotypes were known to researchers but not observers, were filmed.

俄勒冈州立大学的科学家们为23对夫妻设计了一个录像实验。这些实验者的基因类型只有研究人员知道，而实验观察者并未掌握。

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First, the observation may be unreliable in that two or more observers may not agree that the particular response occurred, or to what degree it occurred.

首先，观察结果可能会不可靠，因为两个及以上的观察者可能无法对特定的具体反应是否发生以及反应发生的程度达成一致意见。

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Male observers who did not praise the mark simply wished it away so that they did not see it.

VOA: special.2009.09.26

it's not that there's only one fortunate family of inertial observers.

并不是说只存在一种惯性观察者

耶鲁公开课 - 基础物理课程节选

But observers are not expecting any major signs of a recovery for the airline industry.

VOA: special.2009.06.13

To be objectively real (in the sense of existing an sich and not merely for observers) is not the same as being an object of scientific knowledge.

FORBES: There's Something Wrong with the Philosophy of Mind

But Putin dominates his country's politics in a way that Ahmadinejad does not, observers say.

CNN: Iran's Ahmadinejad to leave politics, newspaper reports

The ruling does not bar observers from sitting in the public gallery, but the limited number of seats, available on a purely first-come-first-served basis, means that access to the courtroom is not guaranteed.

CNN: NATION ON TRIAL